A synarthrosis is a type of joint which permits very little or no movement under normal conditions. Most synarthroses joints are fibrous. The sutures between bones of the skull is an example of synarthrosis.

Anatomical terminology

Suture joints and Gomphosis joints are synarthroses.[1]


They can be categorised by how the bones are joined together:

  • Gomphosis is the type of joint in which a conical peg fits into a socket, for example, the socket of a tooth. Normally, there is very little movement of the teeth in the mandible or maxilla.
  • Synostosis is where two bones that are initially separated eventually fuse together, essentially becoming one bone. In humans, as in other animals, the plates of the cranium fuse together with dense fibrous connective tissue as a child approaches adulthood.[2] Children whose cranial plates fuse too early may suffer deformities and brain damage as the skull does not expand properly to accommodate the growing brain, a condition known as craniostenosis.
  • Synchondrosis is a cartilaginous joint connected by hyaline cartilage, as seen in the epiphyseal plate.

See also


  1. "Module - Introduction to Joints". Archived from the original on 2011-07-18. Retrieved 2008-01-29.
  2. Principles of Anatomy & Physiology, 12th Edition, Tortora & Derrickson, Pub: Wiley & Sons

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